Osteogenesis Imperfecta Type 4

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Retrieved

2021-01-23

Source

Orphanet

Trials

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Genes

COL1A1, COL1A2, WNT1, SERPINF1, PPIB, SPARC, CRTAP, TMEM38B, FKBP10, SP7, LRP5, IFITM5

Drugs

Recombinant humanised monoclonal IgG2 lambda antibody against human sclerostin, human allogeneic bone marrow derived osteoblastic cells

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Osteogenesis imperfecta type IV is a moderate type of osteogenesis imperfecta (OI; see this term), a genetic disorder characterized by increased bone fragility, low bone mass and susceptibility to bone fractures. Patients with type IV have moderately short stature, mild to moderate scoliosis, grayish or white sclera, and dentinogenesis imperfecta (DI; see this term).

Epidemiology

The overall prevalence of OI is estimated at between 1/10,000 and 1/20,000 but the prevalence of type IV is unknown.

Etiology

OI type IV can be autosomal dominant and caused by mutations in the COL1A1 and COL1A2 genes (17q21.31-q22 and 7q22.1 respectively) or it can be autosomal recessive and caused by mutations of the PPIB gene (15q21-q22) (sometimes described as OI type IX) or the CRTAP gene (3p22) (sometimes described as OI type VII).